diff --git a/youtube_formats.py b/youtube_formats.py
new file mode 100644
index 0000000..9b4d14c
--- /dev/null
+++ b/youtube_formats.py
@@ -0,0 +1,52 @@
+# These constants can be used to construct youtube-dl commands while keeping
+# your source code legible.
+AUDIO_M4A_128k = '140'
+AUDIO_M4A_195k = '256'
+AUDIO_M4A_386k = '258'
+AUDIO_OPUS_160k = '251'
+AUDIO_OPUS_50k = '249'
+AUDIO_OPUS_70k = '250'
+COMBINED_AVC_M4A_360p30_96k = '18'
+COMBINED_AVC_M4A_720p30_128k = '22'
+VIDEO_AV1_1080p60 = '399'
+VIDEO_AV1_1440p60 = '400'
+VIDEO_AV1_144p30 = '394'
+VIDEO_AV1_2160p60 = '401'
+VIDEO_AV1_240p30 = '395'
+VIDEO_AV1_360p30 = '396'
+VIDEO_AV1_4320p60 = '571'
+VIDEO_AV1_480p30 = '397'
+VIDEO_AV1_720p60 = '398'
+VIDEO_AVC_1080p30 = '137'
+VIDEO_AVC_1080p60 = '299'
+VIDEO_AVC_1440p30 = '264'
+VIDEO_AVC_1440p60 = '304'
+VIDEO_AVC_144p30 = '160'
+VIDEO_AVC_2160p30 = '266'
+VIDEO_AVC_2160p60 = '305'
+VIDEO_AVC_240p30 = '133'
+VIDEO_AVC_360p30 = '134'
+VIDEO_AVC_480p30 = '135'
+VIDEO_AVC_720p30 = '136'
+VIDEO_AVC_720p60 = '298'
+VIDEO_VP9_1080p30 = '248'
+VIDEO_VP9_1080p60 = '303'
+VIDEO_VP9_1080p60_HDR = '335'
+VIDEO_VP9_1440p30 = '271'
+VIDEO_VP9_1440p60 = '308'
+VIDEO_VP9_1440p60_HDR = '336'
+VIDEO_VP9_144p30 = '278'
+VIDEO_VP9_144p60_HDR = '330'
+VIDEO_VP9_2160p30 = '313'
+VIDEO_VP9_2160p60 = '315'
+VIDEO_VP9_2160p60_HDR = '337'
+VIDEO_VP9_240p30 = '242'
+VIDEO_VP9_240p60_HDR = '331'
+VIDEO_VP9_360p30 = '243'
+VIDEO_VP9_360p60_HDR = '332'
+VIDEO_VP9_4320p30 = '272'
+VIDEO_VP9_480p30 = '244'
+VIDEO_VP9_480p60_HDR = '333'
+VIDEO_VP9_720p30 = '247'
+VIDEO_VP9_720p60 = '302'
+VIDEO_VP9_720p60_HDR = '334'